fix(seeds): 修复多门店种子数据互不干扰

- S001.sql: 修复 INSERT IGNORE INTO 缺少空格的语法错误
- S002.sql: 重写为动态 @shop_id 模式，移除 TRUNCATE，改用 INSERT IGNORE INTO
- clear_shop.sql: 新增按 @shop_code 清空单店数据的参数化脚本
- scripts/dev.sh: seed 命令支持 --clear 参数（先清空再写入）
- seed.yml: 新增 clear 输入参数，支持按需清空后写入

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

scripts/dev.sh

@@ -36,12 +36,22 @@ WEB_PID_FILE="$LOG_DIR/web.pid"
 mkdir -p "$LOG_DIR"
 
 # ── seed 命令 ────────────────────────────────────────────────
-# 用法: cmd_seed <shop_code>
-# 从 backend/config/config.yaml 读取 DSN，执行 backend/seeds/<shop>.sql
+# 用法: cmd_seed [--clear] <shop_code>
+# 从 docker-compose.yml 读取容器信息，执行 backend/seeds/<shop>.sql
+# --clear: 写入前先清空该门店所有数据
 cmd_seed() {
-  local shop="${1:-}"
+  local clear=false
+  local shop=""
+  while [ $# -gt 0 ]; do
+    case "$1" in
+      --clear) clear=true ;;
+      *) shop="$1" ;;
+    esac
+    shift
+  done
+
   if [ -z "$shop" ]; then
-    error "用法: sh scripts/dev.sh seed <shop_code>   示例: sh scripts/dev.sh seed H001"
+    error "用法: sh scripts/dev.sh seed [--clear] <shop_code>   示例: sh scripts/dev.sh seed S001"
     exit 1
   fi
 
@@ -64,6 +74,17 @@ cmd_seed() {
     exit 1
   fi
 
+  if [ "$clear" = "true" ]; then
+    local clear_file="$ROOT/backend/seeds/clear_shop.sql"
+    if [ ! -f "$clear_file" ]; then
+      error "清空脚本不存在: $clear_file"
+      exit 1
+    fi
+    info "清空 ${shop} 数据 → 容器 ${container} / ${db_name}"
+    { printf "SET @shop_code='%s';\n" "$shop"; cat "$clear_file"; } \
+      | docker exec -i "$container" mysql --default-character-set=utf8mb4 -uroot -p"$db_pass" "$db_name"
+  fi
+
   info "写入 ${shop} 种子数据 → 容器 ${container} / ${db_name}"
   docker exec -i "$container" mysql --default-character-set=utf8mb4 -uroot -p"$db_pass" "$db_name" < "$sql_file"
   success "✅ ${shop} 种子数据写入完成"
@@ -107,7 +128,8 @@ show_help() {
   echo "  --web-only             仅启动前端（Web）"
   echo ""
   echo "数据库命令："
-  echo "  seed <shop_code>       清空并写入指定门店测试数据（如 H001）"
+  echo "  seed <shop_code>       写入指定门店测试数据（如 S001）"
+  echo "  seed --clear <shop>    先清空再写入（单店）"
   echo "  reset                  删表重建（AutoMigrate）"
   echo "  clear                  清空所有业务数据"
   echo ""
@@ -135,7 +157,7 @@ case "$COMMAND" in
     esac
     ;;
   seed)
-    cmd_seed "${2:-}"
+    cmd_seed "${2:-}" "${3:-}"
     exit 0
     ;;
   reset)